Sun Valley Park Weather Forecast

    • 67
    • 78

    Rain Showers

    • 55
    • 82

    Rain Showers

    • 51
    • 68

    Chance Rain Showers

    • 56
    • 73

    Rain Showers Likely

    • 59
    • 75

    Rain Showers Likely

    • 60
    • 81

    Chance Rain Showers

    • 63
    • 83

    Chance Rain Showers

Today 18 May Jefferson

Showers with Thunderstorms likely. Some Thunderstorms may produce heavy rainfall. Locally heavy rainfall possible. Near steady temperature in the upper 70s. South Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

Tonight 18 May Jefferson

Mostly cloudy with Showers likely with a chance of Thunderstorms this Evening, then partly cloudy after midnight. Some Thunderstorms may produce heavy rainfall this evening. Lows in the upper 60s. South Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sun Valley Park Temperature Statistics

May Temperature

St. Louis Downtown Airport (22.4 miles)

  • Lowest 7 May, 2026

    39.7 °F

  • Average May

    62.2 °F

  • Highest 15 May, 2026

    84.7 °F

Climate (2021–Present)

St. Louis Downtown Airport (22.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    69.3 °F
Get WillyWeather+ to remove ads